The correct answer is B. The prostate
Step-by-step explanation:
The prostate or prostate gland is an organ of the male reproductive system that secretes fluid to protect sperm, this fluid is commonly known as prostate fluid and it is essential for sperm. Besides this, the prostate gland becomes a concern after middle age (after the age of 40) because during this stage of life there is a higher risk of developing prostate-related diseases such as enlarged prostate that is a benign disease but can affect urinary function and prostate cancer that is a chronic disease and can lead to death. Moreover, this increased risk of developing diseases in the reproductive system after middle age occurs mainly in the prostate, but not other organs such as the testes or the vas deferens.